diff --git a/.github/helper_scripts/post_check_results.py b/.github/helper_scripts/post_check_results.py
index cbf7b32..0e39b4c 100644
--- a/.github/helper_scripts/post_check_results.py
+++ b/.github/helper_scripts/post_check_results.py
@@ -45,9 +45,12 @@ def CollectResults():
     return rows, failed
 
 def PostResults(repo, run_id, rows, failed):
-    run_url = f"https://github.com/{repo}/actions/runs/{run_id}"
-    table   = "\n".join(["| Check | Result | Time |", "|-------|--------|------|", *rows])
-    body    = f"**Check Results** ([run details]({run_url}))\n\n{table}"
+    run_url        = f"https://github.com/{repo}/actions/runs/{run_id}"
+    comment_author = os.environ.get("COMMENT_AUTHOR", "")
+    comment_url    = os.environ.get("COMMENT_URL", "")
+    table          = "\n".join(["| Check | Result | Time |", "|-------|--------|------|", *rows])
+    attribution    = f"Triggered by @{comment_author} on [this comment]({comment_url})\n\n" if comment_author else ""
+    body           = f"{attribution}**Check Results** ([run details]({run_url}))\n\n{table}"
     pr_num  = os.environ["PR_NUMBER"]
     pr_sha  = os.environ["PR_SHA"]
     subprocess.run([
diff --git a/.github/helper_scripts/pr_close_comment.py b/.github/helper_scripts/pr_close_comment.py
index 0f45ac4..f04acc2 100644
--- a/.github/helper_scripts/pr_close_comment.py
+++ b/.github/helper_scripts/pr_close_comment.py
@@ -19,18 +19,22 @@ def Main():
     repo = Github(auth=Auth.Token(github_token)).get_repo(repo_name)
     pr = repo.get_pull(pr_number)
 
-    issue_comment_url = PostCommentOnIssueThread(repo, branch_name, last_commit_sha)
+    merge_commit_sha  = pr.merge_commit_sha
+    issue_comment_url = PostCommentOnIssueThread(repo, branch_name, last_commit_sha, merge_commit_sha)
     PostCommentOnPRThread(pr, user_closing_pr, issue_comment_url)
     return 0
 
 
-def PostCommentOnIssueThread(repo, branch_name, last_commit_sha):
+def PostCommentOnIssueThread(repo, branch_name, last_commit_sha, merge_commit_sha):
     issue_match = re.match(r"^(\d+)", branch_name)
     if not issue_match:
         return None
 
     issue_number = int(issue_match.group(1))
-    issue_body = ISSUE_TEMPLATE.read_text() + f"\n\nLast commit in issue branch: {last_commit_sha}"
+    issue_body   = ISSUE_TEMPLATE.read_text()
+    issue_body  += f"\n\nLast commit in issue branch: {last_commit_sha}"
+    if merge_commit_sha:
+        issue_body += f"\n\nMerge commit: {merge_commit_sha}"
 
     comment = repo.get_issue(issue_number).create_comment(issue_body)
     return comment.html_url
diff --git a/.github/workflows/check-issue.yml b/.github/workflows/check-issue.yml
new file mode 100644
index 0000000..5e3240d
--- /dev/null
+++ b/.github/workflows/check-issue.yml
@@ -0,0 +1,30 @@
+name: Check issue/ is empty
+
+on:
+  pull_request:
+    branches: [main, master]
+    types: [opened]
+  push:
+    branches:
+      - "**"
+  issue_comment:
+    types: [created]
+
+jobs:
+  check-issue:
+    if: |
+      github.event_name == 'pull_request' ||
+      (github.event_name == 'push' && (contains(github.event.head_commit.message, '[run-actions-all]') || contains(github.event.head_commit.message, '[run-actions-issue]'))) ||
+      (github.event_name == 'issue_comment' && github.event.issue.pull_request && (contains(github.event.comment.body, '/run-actions-issue') || contains(github.event.comment.body, '/run-actions-all')))
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event_name == 'issue_comment' && format('refs/pull/{0}/head', github.event.issue.number) || github.sha }}
+      - name: Fail if issue/ is non-empty
+        run: |
+          if [ -d "issue" ] && [ -n "$(ls -A issue/)" ]; then
+            echo "issue/ is not empty. Please delete its contents before merging."
+            exit 1
+          fi
+          echo "issue/ is empty or does not exist."
diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index ca9ce72..5e0fef6 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -92,6 +92,8 @@ jobs:
           GH_TOKEN: ${{ github.token }}
           PR_NUMBER: ${{ github.event.issue.number }}
           PR_SHA: ${{ env.PR_SHA }}
+          COMMENT_AUTHOR: ${{ github.event.comment.user.login }}
+          COMMENT_URL: ${{ github.event.comment.html_url }}
         run: |
           python .github/helper_scripts/post_check_results.py \
             ${{ contains(github.event.comment.body, '--post') && '--post' || '' }}